John Byrns wrote:
In article ,
"Jim Mueller" wrote:

I think you mean miniature tubes. Sub-miniature tubes were used in a few
small battery portables but didn't catch on. They were used extensively in
hearing aids, though.

I don't think it is strictly a matter of them not catching on. They became
commercially affordable right about the same time as transistors. They didn't
stand a chance.


And I think they were used even more extensively in airborne military
computers.

They also showed up in main frame computers. Somewhere I have some cards
that came from some computer that used a staggering number of the wee beasties.

CK6088's were the tube they used.

-Chuck